Elenco Electronics SNAP CIRCUITS SKILL BUILDER - Project 84 Race Game; Race Game Setup; Project 85 Auto-Off Night Light; Auto-Off Night Light Circuit

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This circuit would make a good night light.
It would allow you to get into bed, and
then it would go out. No further current is
taken from the battery so it will not drain
the batteries even if left on all night.
Project 84
Modify Project 82 by adding the pointer as shown on the left. The paper should be
cut from page 30 and taped high enough on the speaker so the pointer will stick
over the fan with paper. Bend the pointer at a right angle as shown on the left.
Setup: Cut out the grid with four (4) colors from page 30 and place it under the
base as shown on the left. Each player picks a color (or two colors if only 2 people
are playing) and places a single snap on row G. The purple player in column 1,
the blue player in column 2, the green player in column 3, and the yellow player
in column 4. Spin the wheel by closing the press switch (S2). The rst single color
wedge that the pointer points to is the rst player to start. In some models you only
have three 1-snaps, so use a 2-snap if you have four players.
The Play: Each player gets a turn to press the press switch. They release the
press switch and when the pointer points to a wedge, the players that match the
colors on the wedge get to move up one space. If a liner comes up like the one
shown on the left then the players on each side of the line get to move up two (2)
spaces. The rst player to reach the top row (A) wins. If two players reach the top
row at the same time they must both drop down to row “D” and play continues.
Race Game
Project 85
Build the circuit to the left. When you turn on the slide switch (S1) the rst
time the LED (D1) will come on and very slowly get dimmer and dimmer.
If you turn the slide switch (S1) off and back on after the LED goes out it
will NOT come on again. The 470mF capacitor (C5) has charged up and
the NPN transistor amplier (Q2) can get no current at its input to turn
it on. To discharge the capacitor (C5) and reset the circuit, press and
release the switch (S2).
Auto-Off Night Light
WARNING: Moving parts. Do not touch the fan
or motor during operation.